At 15:33 -0600 5-03-1997, Bob Colbert wrote:
>Well, here is some code to peek at.
Ok, I hope I'll be able to look at it carefully this weeked. Some early
comments:
- sprites have a fixed height of 8x2 scanlines, ok?
- Do you think that a different way of storing X coordinates might lead to
a more efficient code during screen drawing? For example:
7 6 5 4 3 2 1 0
f f f f c c c c
bits 0-3 = course position, to be used in a DEY-BPL loop for course positioning
LDA XPOS
AND #$0F
TAY
loop:
DEY
BPL loop
bits 4-7 = fine motion value, to be stored to HMPx
LDA XPOS
STA HMP0
Ciao,
P.
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